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中文摘要：
针对垂直和水平基线的双基机载正侧视雷达杂波谱的距离依赖性进行了理论分析和仿真，给出了杂波多普勒频率随距离变化的解析公式，并根据该公式采用谱搬移方法对水平基线的杂波谱进行了补偿。理论分析和仿真表明：在垂直基线的双基系统中，同一距离单元的杂波多普勒频率和空间角频率存在线性关系，杂波谱在主瓣内有较好的重舍；水平基线正侧视雷达的杂波谱在主瓣内较宽。同时仿真还证明．采用谱搬移方法可以有效减轻双基杂波谱随距离变化对空时二维自适应处理性能的影响。
英文摘要：
The range dependence for clutter spectrum is theoretically analyzed and simulated in bistatic airborne sidelooking radar with the vertical and horizontal baselines. And two analytical formulas are given to show the relationship between Doppler frequency and the range. According to the formulas, the spectrum compensation via the Doppler warping method isperformed in the horizontal baseline system. The analysis and simulations show that in the vertical baseline system the clutter trajectory in a given range bin exhibits a straight line on the Doppler-direction plane and the clutter spectrum is almost identical in the mainlobe area, and that the horizontal baseline system has a broad clutter spectrum region in the mainlobe. Simulations also verify that the Doppler warping method can mitigate the range-dependence effect in space time adaptive processing （STAP）.
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